National Geophysical Data Center 
Environmental Satellite, Data, and 
Information Service 
National Oceanic and Atmospheric 
Administration 
325 Broadway 
Boulder, CO 80303 
(303) 497-6215, FTS 320-6215 
Publication 
Summary of Digital Marine Geophysical Data Holdings (Bathymetric, 
Magnetic, and Gravimetric Data) 
Hittelman, A. M., et al., KGRD No. ll 
Publication Date: September 1978 
Location: Worldwide 
Period of Coverage: 1953-1976 
Contents: This publication contains a summary of information on the digital 
marine geophysical data holdings of the National Geophysical Data Center (the 
file contains over 3.5 million bathymetric observations, 2./ million magnetic 
observations, and 1.3 million gravimetric observations). The general 
description of the bathymetric, magnetic, and gravimetric data includes 
discussions on exchange formats, data sources, assimilation procedures, and 
geographic distribution. Data summaries are presented as trackline plots, a 
geographical listing (by 10-deg squares), and by institutional listing. 
Complementary data files, such as US coastal bathymetry, analog marine 
geophysical data (i.e., seismics), site survey data of the Outer Continental 
Shelf, and marine geological data, are reviewed briefly. 
Available From: National Geophysical Data Center 
Environmental Satellite, Data, and 
Information Service 
National Oceanic and Atmospheric 
Administration 
325 Broadway 
Boulder, CO 80303 
(303) 497-6215, FTS 320-6215 
Additional Information: This catalog supersedes KGRD (Key to Geophysical 
Records Documentation) No. 4, Marine Geophysical 
Data Catalog - 1975. 
VII-2 
